Students will represent and solve subtraction problems using disk models. Problems do not require regrouping
B. Use disk models to support solving column subtraction
C. Solve column subtraction with scaffolding
D. Use disk models to practice exchanging into the tens
E. Solve subtraction problems with regrouping (Level 1)
F. Solve subtraction problems with regrouping (Level 2)
G. Solve subtraction problems with regrouping (Level 3)
H. Solve subtraction problems with regrouping (Level 4)
I. Solve column subtraction, making decisions about exchanging into the tens
J. Practice solving column subtraction problems independently (Part 1)
K. Practice solving column subtraction problems independently (Part 2)
L. Solve column subtraction problems with 2- and 3-digit components (Level 1)
M. Solve column subtraction problems with 2- and 3-digit components (Level 2)
N. Solve column subtraction problems with 2- and 3-digit components (Level 3)